Warp-stop mechanism for looms



Nov. 10,1925. 1,560,809;

- M. L. STONE WARP STOP MECHANISM FOR LOOMS Filed July 21, 1925 ATTORNEY I I I I Patented Nov. 10, 1925.

UNITED STATES TION, or HorEnaLE, MASSACHUSETTS, A CORPORATION OFMAINE.

PATENT- oFncE.

wAaP-sTorMEcnAmsi/r roe LOOMS.

Application filed. July 21, 1925. Serial No. 44,988.

To all whom it may concern:

Be it known that I, MELVIN L. STONE, a citizen of the United States, and a resident of Lawrence, in the county of Essex and State of Massachusetts, have invented an Improvement in l/Varp-Stop Mechanisms for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to warp stop mechanisms for looms and more particularlyto means for indicating the warp fault when a warp thread br-eaksor becomes too slack for weaving purposes. I

Looms as now generally constructed are provided with a warp stop motion which comprises a series of drop wires which ordinarily hang upon the warp threads and when one of such threads breaks or becomes too slack for weaving purposes, the drop wire falls or becomes abnormally displaced and through mechanism cooperating with such fallen drop wire, the loom is stopped. Owing to the large number of warp threads employ-ed in looms and .theinconspicuous character of the drop wires, the weaver finds it difficult to locate a the abnormal warp thread which hascaused the loom to stop, and much loss of time is incurred in piecing up the warp thread in case it has been broken'or in taking up on-the slack thereof. An important feature of the present inven-' tion, therefore consists of simple and efiective means'for locating the warp fault when a'warp thread breaks or becomes too slack for weaving purposes and the loom is consequently stopped. The invention and novel features thereof will best be made clear from the following description and the accompanying drawings of one good form thereof.

vIn thedrawings: 1 1 Fig. 1 is a perspective view with parts broken away showing a warp stop'mechanism with the present invention associated therewith;

Fig. 2 is across-sectional view showing the relation of parts when a warp thread breaks or becomes too slack for weaving purposes.

The general parts of the warp stop mechanism may be of any desired or usual construction, but as herein shown the loom frame has supporting brackets 9.1 at each side of-the loom, on which are'supported the end frames 2 carrying themainp'ortions of the warp stop mechanism. The end frames 2', of which there is one at each side of the loom, may have secured thereto, as indicated, the bars 3 as by means of the screws 4, and such bars 3 may conveniently constitute warp supports, as indicated, over which the Warp threads a pass.

. Between the side supports 2 there is a s eries ofdrop wires which are normally supported by the'warp threads during weaving but which drop when a warp thread be comes'broken or too slack for. weaving purposes. 4 v

. In the present instance the drop wires-4L are formed of light metal plates eachof which has an opening 5 through which the in positionby a screw-10, the function ofthe cap plate 8 being to maintain the drop wire guides 7 in their drop wire guiding position. So far as the present invention is concerned, the drop wires may be of any usual form, but are preferably made of light metalplates, as indicated, and the drop wire guides 7 arepreferably made circular in cross-section, because the present invention, contemplates that when a drop wire fails to be; supported by its warp] thread, asj indicated in Fig. 2', and consequently falls or moves vertically, it may be engaged by a feeler anddisplaced, as will presently appear, to indicate the location of the warpfault. a

-,Mounted 'in suitable brackets 11 is a feeler shaft 12 which, as-shown, extends transversely of the loom'and has extended therefrom the feeler arms, each of which carries a feeler 14, preferably provided with the usual serrated edge 15. The feeler shaft 12 is given a rockingmovement through an arm.16 actuated by a rod l7'from a going part of the loom, and capable of being arrested in such movement by a fallen drop wire, -'lihe detai s 915 the means for actuat ng inclined surface to tilt the fallen drop wire and indicate the location of the warp fault.

4. In a warp stop mechanism for looms, the combination of a series of drop wires, a drop wire indicating bar having a vertically inclined surface and division walls extending outwardly therefrom in spaced relation to receive a fallen drop wire and guide it edgewise into engagement with the vertically inclined surface, and a feeler for moving a fallen drop wire between the division walls into engagement with the in clined surface to tilt the drop wire and locate-the warp fault.

5. In a Warp stop mechanism for looms, the combination of a series of drop wires, a drop wire guide relative to which the drop wires are adapted to swing in a vertical plane, a drop wire indicating bar having a vertically inclined surface and division walls extending outwardly therefrom in spaced relation to receive a fallen drop wire and guide it edgewise into engagement with the vertically inclined surface, and a feeler for moving a fallen drop wire between the division walls into engagement with the inclined surface to tilt the drop wire and locate the the combination of two series of drop wires,

a drop wire indicating bar therebetween having opposite inclined surfaces and division walls extending outwardly therefrom in spaced relation to receive a drop wire and guide it into engagement with the adjacent inclined surface, and a feelerfor moving a drop wire between the division walls into engagement with the inclined surface to tilt the drop wire and locate the warp fault. V

7. In a warp stop mechanism for looms, the combination of a series of drop wires,

a drop wire indicating bar having a series I of inclined kerfs the bottom walls of which are vertically inclined, and a feeler for 

